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Electromagnetic Field Theory

Electromagnetic Field Theory
Poyniting vector has the dimensions

 Watt/metre.
 Watts/metre2.
 Watt × metre2.
 Watt × metre.

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Electromagnetic Field Theory
What is the unit of magnetic charge

 Ampere.
 Coulomb.
 Ampere-meter square.
  Ampere meter.

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Electromagnetic Field Theory
In case of antenna the ratio of the power radiated in the desired direction to the power radiated in the opposite direction is known as

Loss coefficient
None of these
Front to back ratio
Transmission efficiency

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Electromagnetic Field Theory
A magnetic circuit requires 800 AT to produce a certain quantity of flux in a magnetic circuit. If its excitation coil has 100 turns and 5 Ohm resistance, the voltage to be applied in exciting coil is

 80 V.
 8 V.
 60 V.
 40 V.

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Electromagnetic Field Theory
XEROX machine is working on

 magnetic effect.
 electrostatic effect.
 heating effect of current.
 peltier effect.

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Electromagnetic Field Theory
A magnetic vector potential is given by the expression A = (- cos x) (cos y) uz. The flux density at the origin is

 – uy.
 – 2 ux.
  0.
 2 ux.

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MORE MCQ ON Electromagnetic Field Theory

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